Mechanism of hydrogen embrittlement cracking produced by residual stress from indentation impression

Niwa, Michihiro; Shikama, Taiki; Yonezu, Akio

doi:10.1016/j.msea.2014.11.008

Cited by 28 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ball milling induces stresses in the material, which could favor crack formation when subjected to hydrogen, causing decrepitation of the powder. This has been studied in steel, where crack formation was observed in the residual stress field around an indent after subjecting the material to hydrogen, in agreement with higher hydrogen content due to lattice distortion in HEAs …”

Section: Resultsmentioning

confidence: 67%

See 1 more Smart Citation

Structure and Hydrogenation Properties of a HfNbTiVZr High-Entropy Alloy

et al. 2018

View full text Add to dashboard Cite

A high-entropy alloy (HEA) of HfNbTiVZr was synthesized using an arc furnace followed by ball milling. The hydrogen absorption mechanism was studied by in situ X-ray diffraction at different temperatures and by in situ and ex situ neutron diffraction experiments. The body centered cubic (BCC) metal phase undergoes a phase transformation to a body centered tetragonal (BCT) hydride phase with hydrogen occupying both tetrahedral and octahedral interstitial sites in the structure. Hydrogen cycling of the alloy at 500 °C is stable. The large lattice strain in the HEA seems favorable for absorption in both octahedral and tetrahedral sites. HEAs therefore have potential as hydrogen storage materials because of favorable absorption in all interstitial sites within the structure.

show abstract

Section: Resultsmentioning

confidence: 67%

“…This has been studied in steel, where crack formation was observed in the residual stress field around an indent after subjecting the material to hydrogen, in agreement with higher hydrogen content due to lattice distortion in HEAs. 20 3.2. In Situ X-ray Diffraction Measurements.…”

Section: Resultsmentioning

confidence: 99%

Structure and Hydrogenation Properties of a HfNbTiVZr High-Entropy Alloy

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Thick high-strength steel plates are widely used in ship structures, but large residual tensile stress occurs near the weld [1,2]. The chemical potential of hydrogen is changed because residual stress interacts with the strain field of hydrogen, thus inducing hydrogen to diffuse and accumulate in the region of stress concentration [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Residual Stress on Hydrogen Diffusion in Thick Butt-Welded High-Strength Steel Plates

Jiang¹,

Zeng

2022

Metals

View full text Add to dashboard Cite

Thick high-strength steel plates are increasingly being used for ship structures. Moreover, hydrogen enters the process of manufacturing and service, and large residual tensile stress occurs near the weld. Such stress can facilitate the diffusion and accumulation of hydrogen in the material, leading to hydrogen embrittlement fracture of the shell. Therefore, residual-stress-induced diffusion and accumulation of hydrogen in the stress concentration region of thick butt-welded high-strength steel plate structures need to be studied. In this study, manual metal arc welding was realized by numerical simulation of residual stress in a thick butt-welded high-strength steel plate model using the thermoelastic–plastic theory and a double ellipsoidal heat source model. To analyze residual stress, a set of numerical simulation methods was obtained through comparative analysis of the test results of relevant literature. Residual and hydrostatic stress distributions were determined based on these methods. Then, hydrogen diffusion parameters in each region of the model were obtained through experimental tests. Finally, the results of the residual stress field were used as the predefined field of hydrogen diffusion to conduct a numerical simulation analysis. The distribution of hydrogen diffusion under the influence of residual stress was obtained based on the theory of stress-induced hydrogen diffusion. The weak area of the welding joint was found to be near the weld toe, which exhibited high hydrostatic stress and hydrogen concentration. Further, the maximum hydrogen concentration value of the vertical weld path was approximately 6.1 ppm, and the maximum value of the path parallel to the weld centerline and 31 mm away from the weld centerline was approximately 6.22 ppm. Finally, the hydrostatic tensile stress in the vertical weld path was maximized (~345 MPa), degrading the material properties and causing hydrogen-related cracking. Hence, a reliable method for the analysis of hydrogen diffusion according to residual stress in thick high-strength steel plates was obtained. This work could provide a research basis for controlling and eliminating the adverse effects of hydrogen on the mechanical properties of ship structures and ensuring the safe service of marine equipment.

show abstract

“…Seguindo a lógica de Djukic, estudos mais recentes de FH, Barnoush et al (BARNOUSH, 2006, 2008, Niwa et al (NIWA, 2015) região tensionada da trinca e essa região crescia com o surgimento de novos hidretos. Esses hidretos cresciam e formavam novos e maiores hidretos.…”

Section: Fragilização Por Hidrogênio De Aços Para Estampagem à Quenteunclassified

“…Passados mais de cento e quarenta anos da observaçãode Johnson, os efeitos deletérios do hidrogênio nos aços são conhecidos, embora nem sempre os mecanismos pelos quais esses efeitos ocorram o sejam. Assim, é necessário conhecer as formas de entrada do hidrogênio bem como os mecanismos de ação do hidrogênio na fragilização dos aços.Com essa visão global apresentada porBarnoush (BARNOUSH, 2007), percebe-se que muitos dos casos relatados na literatura sobre a FH focam em problemas pontuais e suas possíveis soluções, considerando poucos aspectos e negligenciando diversos outros, falhando em explicar de forma mais geral os fenômenos relacionados(ELIAZ, 2002; TSAY, 2006;NISHIMURA, 2009;BARNOUSH, 2010;RECIO, 2013;NIWA, 2015;SANCHEZ, 2016;.Djukic et al, "é factível que nos metais diversos mecanismos de FH operem simultaneamente, porém um sendo o dominante em certas condições" e é o que os resultados do estudo "Hydrogen Embrittlement of Industrial Components:…”

unclassified

Estudo da permeabilidade do hidrogênio no aço 22MnB5 preparado pelo método Press Hardening.

Martins¹

View full text Add to dashboard Cite

show abstract

Mechanism of hydrogen embrittlement cracking produced by residual stress from indentation impression

Cited by 28 publications

References 21 publications

Structure and Hydrogenation Properties of a HfNbTiVZr High-Entropy Alloy

Structure and Hydrogenation Properties of a HfNbTiVZr High-Entropy Alloy

Effect of Residual Stress on Hydrogen Diffusion in Thick Butt-Welded High-Strength Steel Plates

Estudo da permeabilidade do hidrogênio no aço 22MnB5 preparado pelo método Press Hardening.

Contact Info

Product

Resources

About